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Topic: From: Mp3 VBR Question (Read 1442 times) previous topic - next topic
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From: Mp3 VBR Question

--vbr-new is faster than CBR which is faster than ABR which is faster than --vbr-old.
That's mostly true, except it looks like ABR is (a little bit) faster than CBR.  That's what this little test I did indicated, anyway.
Code: [Select]
Track 1 (pop punk) - 3 minutes 51 seconds
-V 5 -h 29 seconds
-b 128 -h   24 seconds
--abr 128 -h 22 seconds
-V 5 -h --vbr-new  11 seconds

Track 2 (hard rock) - 3 minutes 44 seconds
-V 2 16 seconds
-b 192   12 seconds
--abr 192   12 seconds
-V 2 --vbr-new   12 seconds

Track 3 (industrial) - 10 minutes 43 seconds
-V 0 46 seconds
-b 256   38 seconds
--abr 256   38 seconds
-V 0 --vbr-new   35 seconds
For "Track 2" I used a stopwatch to make sure I put them in the correct order.  When put next to a time device that measures hundredths of a second, it becomes apparent that LAME always rounds the encoding time down.  The cat's out of the bag, LAME devs.

I tried to keep the bitrate in a somewhat similar range too.  I'm not sure if that really makes any difference, but I wanted to eliminate as many variables as possible.

Edit: I just realized that I messed up the last ABR/CBR comparison.  It looks like CBR beats out ABR by a very small amount.  Maybe that general rule is true after all.  I can't seem to get consistent results, so I'll just say that they're the same speed.